private void PaintNodeAndChildren(Graphics g, LayoutGraph graph, Node node)
{
PaintNode(g, graph, node);
INodeLabelLayout[] labels = layoutGraph.GetLabelLayout(node);
if (labels != null && labels.Length > 0)
{
foreach (INodeLabelLayout label in labels)
{
PaintNodeLabel(g, layoutGraph, node, label);
}
}
if (grouping.IsGroupNode(node))
{
SolidBrush oldBrush = this.nodeFillBrush;
Color color = Color.FromArgb(Math.Min(255, (int)(oldBrush.Color.R * 0.9f)),
Math.Min(255, (int)(oldBrush.Color.G * 0.9f)),
Math.Min(255, (int)(oldBrush.Color.B * 0.9f)));
this.nodeFillBrush = new SolidBrush(color);
for (ListCell cell = this.grouping.GetChildren(node).FirstCell; cell != null; cell = cell.Succ())
{
Node child = (Node)cell.Info;
PaintNodeAndChildren(g, layoutGraph, child);
}
this.nodeFillBrush.Dispose();
this.nodeFillBrush = oldBrush;
}
}
public GraphCanvas(LayoutGraph graph)
{
this.RenderTransform = new TranslateTransform(_padding, _padding);
var grouping = new GroupingSupport(graph);
// Add all edges
foreach (var edge in graph.Edges)
{
IEdgeLayout el = graph.GetLayout(edge);
var l = new Polyline();
l.Stroke = Brushes.Black;
l.Points.Add(new Point(graph.GetSourcePointAbs(edge).X, graph.GetSourcePointAbs(edge).Y));
for (int i = 0; i < el.PointCount(); i++)
{
Point p = new Point(el.GetPoint(i).X, el.GetPoint(i).Y);
l.Points.Add(p);
}
l.Points.Add(new Point(graph.GetTargetPointAbs(edge).X, graph.GetTargetPointAbs(edge).Y));
this.Children.Add(l);
// edge labels
var edgeLabelLayout = graph.GetLabelLayout(edge);
foreach (var labelLayout in edgeLabelLayout)
{
var orientedRectangle = labelLayout.LabelModel.GetLabelPlacement(
labelLayout.BoundingBox,
graph.GetLayout(edge),
graph.GetLayout(edge.Source),
graph.GetLayout(edge.Target),
labelLayout.ModelParameter);
this.Children.Add(GetPolygon(orientedRectangle));
}
}
// add all nodes
foreach (var node in graph.Nodes)
{
INodeLayout nl = graph.GetLayout(node);
Color color = grouping.IsGroupNode(node) ? Color.FromArgb(60, 255, 60, 0) : Color.FromArgb(255, 255, 255, 0);
var rect = new Rectangle();
this.Children.Add(rect);
rect.Stroke = new SolidColorBrush()
{
Color = Colors.Black
};
rect.Fill = new SolidColorBrush()
{
Color = color
};
rect.Width = nl.Width;
rect.Height = nl.Height;
Canvas.SetTop(rect, nl.Y);
Canvas.SetLeft(rect, nl.X);
// display the node index
var text = new TextBlock()
{
Text = String.Empty + node.Index,
HorizontalAlignment = HorizontalAlignment.Center,
VerticalAlignment = VerticalAlignment.Center
};
this.Children.Add(text);
text.Measure(new Size(Double.PositiveInfinity, Double.PositiveInfinity));
Canvas.SetTop(text, nl.Y + nl.Height / 2 - text.DesiredSize.Height / 2);
Canvas.SetLeft(text, nl.X + nl.Width / 2 - text.DesiredSize.Width / 2);
}
}